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cbce12d22b
The command IPC_STAT of semctl expects an union semun in its fourth argument instead of struct semid_ds *. This can cause failures on powerpc32-linux-gnu. Checked on x86_64-linux-gnu, i686-linux-gnu, and powerpc32-linux-gnu (qemu system emulation).
124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
/* Basic tests for SYSV semaphore functions.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/sem.h>
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#include <support/support.h>
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#include <support/check.h>
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#include <support/temp_file.h>
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/* These are for the temporary file we generate. */
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static char *name;
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static int semid;
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static void
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remove_sem (void)
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{
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/* Enforce message queue removal in case of early test failure.
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Ignore error since the sem may already have being removed. */
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semctl (semid, 0, IPC_RMID, 0);
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}
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static void
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do_prepare (int argc, char *argv[])
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{
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int fd = create_temp_file ("tst-sysvsem.", &name);
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if (fd == -1)
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FAIL_EXIT1 ("cannot create temporary file (errno=%d)", errno);
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}
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#define PREPARE do_prepare
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/* It is not an extensive test, but rather a functional one aimed to check
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correct parameter passing on kernel. */
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#define SEM_MODE 0644
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union semun
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{
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int val;
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struct semid_ds *buf;
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unsigned short *array;
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};
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static int
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do_test (void)
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{
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atexit (remove_sem);
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key_t key = ftok (name, 'G');
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if (key == -1)
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FAIL_EXIT1 ("ftok failed");
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semid = semget(key, 1, IPC_CREAT | IPC_EXCL | SEM_MODE);
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if (semid == -1)
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{
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if (errno == ENOSYS)
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FAIL_UNSUPPORTED ("msgget not supported");
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FAIL_EXIT1 ("semget failed (errno=%d)", errno);
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}
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/* Get semaphore kernel information and do some sanity checks. */
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struct semid_ds seminfo;
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if (semctl (semid, 0, IPC_STAT, (union semun) { .buf = &seminfo }) == -1)
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FAIL_EXIT1 ("semctl with IPC_STAT failed (errno=%d)", errno);
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if (seminfo.sem_perm.__key != key)
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FAIL_EXIT1 ("semid_ds::sem_perm::key (%d) != %d",
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(int) seminfo.sem_perm.__key, (int) key);
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if (seminfo.sem_perm.mode != SEM_MODE)
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FAIL_EXIT1 ("semid_ds::sem_perm::mode (%o) != %o",
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seminfo.sem_perm.mode, SEM_MODE);
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if (seminfo.sem_nsems != 1)
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FAIL_EXIT1 ("semid_ds::sem_nsems (%lu) != 1",
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(long unsigned) seminfo.sem_nsems);
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/* Some lock/unlock basic tests. */
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struct sembuf sb1 = { 0, 1, 0 };
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if (semop (semid, &sb1, 1) == -1)
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FAIL_EXIT1 ("semop failed (errno=%i)", errno);
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struct sembuf sb2 = { 0, -1, 0 };
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if (semop (semid, &sb2, 1) == -1)
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FAIL_EXIT1 ("semop failed (errno=%i)", errno);
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#ifdef _GNU_SOURCE
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/* Set a time for half a second. The semaphore operation should timeout
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with EAGAIN. */
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struct timespec ts = { 0 /* sec */, 500000000 /* nsec */ };
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if (semtimedop (semid, &sb2, 1, &ts) != -1
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|| (errno != EAGAIN && errno != ENOSYS))
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FAIL_EXIT1 ("semtimedop succeed or returned errno != {EAGAIN,ENOSYS} "
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"(errno=%i)", errno);
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#endif
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/* Finally free up the semnaphore resource. */
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if (semctl (semid, 0, IPC_RMID, 0) == -1)
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FAIL_EXIT1 ("semctl failed (errno=%d)", errno);
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return 0;
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}
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#include <support/test-driver.c>
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